Alan Daniels (Updated: 12/19/2015):
As America entered the First World War in 1917, it too found itself with next to nothing in the way of an established modern military arms-producing industry - let alone a serviceable standard infantryman rifle. In fact, arms production in the United States was such that there were not enough rifles being manufactured to supply every American soldier heading off to war. As American factories were already providing Allied soldiers with local-production versions of the excellent British-design Enfield Pattern 14 rifles, it was decided to utilize the type to produce a similar rifle chambered to fire the American standard .30-06 caliber cartridge. This decision wisely cut down design time and lowered production costs for the new "M1917" - or "Model 1917" - rifle. Once again, Winchester, Remington and Eddystone all provided the rifle in quantity with totals being 545,511, 545,541 and 1,181,09 from these manufacturers respectively. Production for the new American rifle could even continue unhindered alongside the British P14's for both rifles were essentially the same firearm differentiated mainly by their chosen calibers.
The M1917's external appearance was characterized by its encapsulating wood work and occasionally exposed metal works. Traditional sights were located aft over the receiver with the bolt-action lever situated over the right side of the gun body in the usual way. The forward site was appropriately affixed nearer the muzzle. The trigger was underslung and located at the base of the integrated rifle buttstock-and-grip. Sling loops were featured at the buttstock underside and under the forend. The American model - recognized as the "American Enfield" - was fed from a 6-round magazine supporting the more powerful (compared to the British .303) .30-06 Springfield (8.62x63mm) cartridge and its action managed through the aforementioned bolt lever on a Mauser-based turn bolt (many long guns of the period were influenced by the classic German Mauser design). Muzzle velocity was listed at 2,700 feet-per-second while the gun weighed in at just over nine pounds. As was common to all service rifles in The Great War, a bayonet could be affixed to the M1917, providing for a lethal "reach" against enemy soldiers at close quarters.